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Noise Engineering Roucha Legio State-variable Multimode Filter Eurorack Module , $310.00 - Add to Cart Skip to Product Information

Noise Engineering Roucha Legio State-variable Multimode Filter Eurorack Module

6HP Eurorack Multimode 12db/Octave Filter Module with Lowpass, Bandpass, and Highpass Modes, Wavefolding, Bypass, 4 x CV In, and Stereo I/O
Item ID: RouchaLegio
Noise Engineering Roucha Legio State-variable Multimode Filter Eurorack Module
We Can Get It!

While this isn't an item we normally stock, we can still get it to you as fast as possible due to our great relationship with Noise Engineering. Go ahead and place your order and we'll follow up shortly to let you know when to expect it. Estimated November 2026

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Noise Engineering Roucha Legio State-variable Multimode Filter Eurorack Module
We Can Get It!

While this isn't an item we normally stock, we can still get it to you as fast as possible due to our great relationship with Noise Engineering. Go ahead and place your order and we'll follow up shortly to let you know when to expect it. Estimated November 2026

Flexible, Ferocious, and Emphatic Filtering

This article was Written By

Our Product Research Team

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As it pertains to synth sounds, Noise Engineering has demonstrated with their Legio world of modules that the physical limitations of size and interface arrangement are a boon to creativity in the right hands. According to Sweetwater’s synthesists, Rouch Legio has more than benefited from this approach to design. Despite its 6HP profile, this 12dB/octave state-variable multimode filter packs a punch worth at least three modules of its size. Resonance and frequency values are easily dialed in by their respective encoders, but they can also be attenuated via CV, which is perfect for expressive control and live performance. In fact, the frequency encoder hosts its own fun secret: the faster you spin it, the more the rate of frequency change increases. What happens if you click it? You can immediately bypass the entire module — another must-have tool for performance purposes and capable of being activated by a gate signal to the Bypass CV input for added flexibility. Highpass, bandpass, and lowpass filter modes are toggled via a 3-way selector and the opposing tripartite switch handles — of all things — a wavefolder. That’s right, and you can choose to include it before or after the signal chain, or at both ends. The choice is yours!

World of Legio: the 6HP transformable powerhouse

Noise Engineering’s unwavering commitment to owning and personalizing your experience doesn’t stop with the versatility and scope of its modules. Those endowed with the Legio title can quickly and wholly reimagine their inspiration via the powerful onboard stereo oscillator and effects platform. All you need is an Internet connection and a USB cable! Alternate firmware and open-source DIY resources are freely available from Noise Engineering to Legio module owners, supplementing your sound with a world of customizable possibilities.

Noise Engineering: unbridled passion for modulation magic

From the beginnings of humble happenstance to transcending the physical-digital divide to produce compelling, innovative hardware and software instruments, one crucial element has consistently remained as Noise Engineering’s cornerstone: integrity. The company wholeheartedly understands how infinitely personal your relationship to sound can be, so each instrument — physical or virtual — brims with a distinctive character. Additionally, every module provides maximum room for personalized control while retaining its defining attributes that give Noise Engineering’s designs their unmistakable sonic identity. Whether you’re new to Eurorack or a dyed-in-the-wool synthesist, you can rest assured knowing that the creative team at Noise Engineering crafts each aural opportunity with care, one waveform at a time.

Noise Engineering Roucha Legio Features:

  • 6HP module provides powerful, flexible filtering without compromising rackspace
  • 12dB/octave state-variable, multimode filter includes highpass, bandpass, and lowpass options for versatile sound shaping
  • Resonance and Frequency values can be controlled manually or via CV to fit your studio or performance needs
  • Wavefolding is available via 3-way switch, with options for pre- or post-signal chain implementation, or both
  • CV inputs can attenuate wavefolding amount, while a gate input can bypass the module entirely for live buildups and dramatic expression
  • Frequency encoder can be clicked for bypass as well, ensuring you’re never missing out on the module’s suite of features

Warranty Info

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Offer applies only to single-receipt qualifying purchases. Select manufacturers may require that only the manufacturer’s products qualify towards the minimum purchase amount needed to be eligible for promotional financing. Otherwise, an invoice that meets the minimum purchase amount and contains at least one qualifying manufacturer product is eligible for promotional financing. No interest will be charged on promo purchase balance, and equal monthly payments are required on promo purchase until it is paid in full. The payments equal the amount financed divided by the number of months in the promo period, rounded up to the next whole dollar. These payments may be higher than the payments that would be required if this purchase was a non-promo purchase. During the last month(s) of the promo period the required monthly payment may be reduced due to the prior months’ rounding. Regular account terms apply to non-promo purchases. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

Offer applies only to single-receipt qualifying purchases. No interest will be charged on the promo balance if you pay it off, in full, within the promo period. If you do not, interest will be charged on the promo balance from the purchase date. The required minimum monthly payments may or may not pay off the promo balance before the end of the promo period, depending on purchase amount, promo length and payment allocation. Regular account terms apply to non-promo purchases and, after promo period ends, to the promo balance. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

The estimated required monthly payment shown which excludes taxes and delivery equals the amount financed divided by the number of months in the promo period, rounded up to the next cent. During the last month(s) of the promo period the required monthly payment may be reduced due to this rounding. These payments apply only with the financing offer shown. If you make these payments by the due date each month, you should pay off this amount financed within the promo period, if it is the only balance you are paying off. If you have other balances on your account, this payment will be added to any other minimum monthly payments.

Applies only to select items from this manufacturer. Ask your Sweetwater Sales Engineer for more details.